LW MEASUREMENTS TREE WPB Series User manual

Professional Weighing
Equipment
WPB Series intelligent weighing scale
HIGH RESOLUTION BALANCE
WITH COUNTING FUNCTION
WPB Series
Operation Manual

2
Table of Contents
Section Page
3
4
5
6
7
8
9
10
11
11
12
13
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14
15
16
16
Declaration of
Conformity Customer
Service Introduction
Safety
Weight Scale
Functions
Features
Application & Conformity
Getting Started
Delivery
Assembly & Installation
Display
Weighing
Calibration
Function Setting
Maintenance & Service
Transportation & Storage
Warranty 17
Rev.4 02.07.2023

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Declaration of Conformity
Declaration of conformity for apparatus with CE mark
We hereby declare that the product to which this declaration refers conforms to
the following standards.
Electronic scale:WPB - High Resolution Balances
USA model
WPB-13 lb
WPB-33 lb
Mark applied
EU Directive
Standards
2004/108/EC
EN 61326-1: 2006
Signature:
Boon Lim, R & D Manager
Date: 14. 06. 2012
LW Measurements LLC, 620 Carlson Court, Rohnert Park, CA 94928
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Customer Service
USA
LW Measurements LLC
620 Carlson Court
Rohnert Park, CA 94928
USA
Tel: [phone]
FAX: [phone]
http://lwmeasurements.com
Rev.4 02.07.2023

5
Introduction
What you should know about these Operating Instructions:
Tree® Professional Weighing Equipment products are simple to operate.
Nevertheless, you should read through these operating instructions in their entirety, so
that you can make optimum use of the full potential and the diverse possibilities of the
weighing scale in your daily work.
These operating instructions contain guidance in the form of pictograms and keyboard
diagrams, which should help you in finding the required information:
For the labeling of potential hazards and advice, please see Safety below.
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Safety
Representations and symbols
Important instructions, which involve safety, are highlighted with the appropriate mark:
Safety recommendations
When using the weighing equipment in surroundings with increased safety requirements,
the corresponding regulations must be observed.
The weighing scale may only be used with the power adapter supplied.
Before connecting the power adapter to the scale, the user must ensure that the
operating voltage stated on the power adapter is compliant with the mains voltage.
If not, please contact Customer Service at the address above.
If the power adapter or its cable is damaged, the weighing scale must immediately be
disconnected from the electricity supply (pull out the power adapter).
If there should be any reason to believe that it is no longer safe to operate the scale, it
should be immediately unplugged from the electricity supply (pull out power adapter) and
secured against inadvertent operation.
In carrying out maintenance work, it is essential to follow the recommendations set out in
maintenance and servicing.
The weighing scale must not be operated in an area subject to explosion risks.
Care must be taken when weighing liquids to ensure that no liquid is spilled into the
inside of the scale or into connections on the rear of the equipment or the power
adapter. If liquid is spilled on the scale, it must immediately be unplugged from the main
electricity supply (pull out power adapter).
The weighing scale may be operated after it has first been inspected by a service
technician.
These operating instructions must be read by each user and should be easily accessible
at the workplace at all times.
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Weight Scale
Construction & Functions
The weighing scale consists of the following parts;
Weight scale body (1)
The scale-pan (2)
The adapters (3)
Operating manual
Your weighing scale
3
1
2
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Functions
The HRB Series are high-quality electronic precision weighing scales with counting
function and the following specifications
Model number
Capacity
Graduation
Weighing pan Size
WPB 13lb
6000g
0.2g
210mm x 160mm
13 lb.
0.01 oz.
8.3 in x 6.3in
WPB 33lb
15000g
0.5g
210mm x 160mm
33 lb.
0.02 oz.
8.3 in x 6.3 in
Net/gross weight
3100g/3500g
/ 1.4 lb. / 1.6 lb.
Package
4 Units in one box: 65 x 56 x 24 (cm
3
)/ 25.6 x 22 x 9.5 in
(Standard carton)
WPB 3kg/6kg/15kg/30kg:31.5 x27.5 x21.5(cm
3
)/12.4x10.8 8.5 in
Package
4 Units in one box: 65 x 56 x 24 (cm
3
)
(Master carton)
25.6 x 22 x 9.5 in
Operating Temp.
0-40℃ (32-104℉)
WPB Series: 6 x AA dry cells(not included) or AC/DC
Power source
Adapter :WPB Series: 9V DC/100mA
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Features
Auto shut off (selectable)
Auto zero tracking
Low battery indication
Stainless steel casing and platter
Large square weighing pan
Net weight/stability indication
1/30000 division available
Auto calibration (AnyCal Software)
Auto backlight (selectable)
kg/g/lb/oz/lb:oz conversion
Counting function
Details of your weighing scale
Top of unit
Bottom of unit
AC Adapter socket
On/Off switch
Platter
Unit
On/Off
Zero
PCS
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Application & Conformity
The Following are instructions of how to correctly use the weight scale:
The weighing scale may only be used for the weighing of solid-materials and of liquids
filled into secure containers.
The maximum capacity load of the weighing scale must never be exceeded, otherwise
the weighing scale may be damaged.
In using the weighing scale in combination with other devices as well as with devices
produced by other manufacturers, the appropriate regulations for the safe use of the
relevant attachments and their application in accordance with instructions must be
observed.
The weighing scale has been manufactured and tested in accordance with the
standards and recommendations set out in the declaration of conformity.
The power adapter supplied for the weighing scale complies with the appropriate
electrical protection class.
The following applies to WPB series
Power supply:
Use only AC adapter with the scale/balance. Other adapters may cause damage.
Adapter 9V/100mA
If you have any questions on the technical data or require detailed technical
information on your balance, please contact your technical representative.
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GETTING STARTED
The scale is packaged in an environmentally-friendly carton, which provides optimum
protection for the balance during transportation.
We suggest that you keep the original packaging in order to avoid damage if you are
shipping or transporting the scale to a different location. It is also the best way to keep it
in the best conditions if it will not be used for an extended period of time.
In order to avoid damage, please follow the instructions provided below, when
unpacking the scale:
Unpack the scale carefully.
When outside temperatures are very low, the scale should be stored for a couple
hours and kept in its box in a dry room at normal temperature, so that no
condensation settles on the unit when opening the box.
Check the scale immediately after unpacking for any external visual damage. If
there is any damage on scale, contact customer service immediately.
If the scale is not to be used immediately after purchase, it should be stored in a
dry place where fluctuations in temperature are low. (Reference pg.16).
Read through these operating instruction, before you work with the unit and pay
attention to the Safety recommendations (reference Safety pg. 6).
Delivery
Inspect delivery for completeness immediately on unpacking all components.
Checklist for complete delivery
Component delivered present yes / no
Weighing unit body
Weighing pan
Power adapter
Operating manual
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Assembly & Installation
The weighing scale is delivered in a partly dismantled condition. Assemble the individual
components in the following sequence:
Place your machine on a level, clean, and dry surface to obtain accurate
readings.
Place the stainless steel platter on top of the plastic platter with the flat side
facing up.
Connecting the AC Adapter
The following Safety recommendations must be observed when connecting the scale:
The Scale should only be connected to the mains voltage socket with the power adapter
supplied. Check before connecting the power adapter to the mains socket, that the
operating voltage stated on the power adapter complies with the local mains voltage.
If the operating voltage is not the same as the mains voltage, the power adapter must
not be connected to the mains socket and contact customer service.
Placement of Scale
The location in which the scale is placed is very important in order for the scale to work
to its full potential. Certain conditions can affect the capabilities of the scale, conditions
like: the presence of air flow, variations in temperature, and direct sunlight. Please
follow the recommendations given below in choosing a location to place your scale.
Place the scale on a solid, firm and preferably vibration-proof, horizontal base
Make sure that the weighing machine cannot be shaken or knocked over
Protect from direct solar radiation
Avoid drafts and excessive temperature fluctuations
Avoid placing the scale near or on any magnetic surfaces.
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Display messages:
Low Battery
Tare
Zero Function
Key Functions:
The On/Off key is to turn the Balance On or Off (Note: it has an On/Off hard
switch at the bottom).
The Zero key allows the user to subtract the container value multiple times within
the capacity weight, and is used to set or re-adjust the weighing scale in correct
zero position.
The Print key is to send data to external device through RS232 connector.
The Unit key is to toggle between different units of measurement.
The PCS key is for piece counting
Weighing
Please see our web-site at http://lwmeasurements.com for practical demonstrations of
application usage.
Before weighing
Error messages:
Err-O: Overload
Symbol: Low battery
Weighing procedures
Press switch key at the bottom of the scale to be ON, and press (ON/OFF) key to
turn on the scale. When power in turned on, the display will show segments and
then “0” will appear on the display.
Select the weighing units with the (UNIT) key. Press (UNIT) to select a weighing
unit, e.g. “kg”, “g”, “lb”, “oz”, “lb:oz”. Once the unit has been selected, the unit
arrow will be displayed next to the weigh value.
Start weighing. If you do not use a container for weighing: Verify if the reading
is “0”. If not, press (ZERO) to display “0”. Place the objects on the weighing
platform to weigh. When the reading becomes stable, the stable indicator is
displayed. If you use a container for weighing: Place an empty container on
the platform. Wait for the stability indicator to be displayed and press (ZERO).
Place the objects to be weighed in the container. When the reading becomes
stable, the stability indicator is displayed.
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Pieces counting
Press the “On/Off” to turn on the Balance, wait for “0” to appear on the display, If
necessary, press [ZERO] key to set the display to “0”.
Press “PCS” key to enter “PCS” mode, display will show P = XX
Press “Unit” key to select XX value (10, 20, 50 or 100).
Place a given number of samples of one item on the pan, the sample size
should be 10, 20, 50 or 100 pieces.
Press the “PCS” key to confirm sample quantitystart counting by adding weight
on the platform.
Press the “Unit” key to return to the weighing mode.
Calibration
Note: Calibration is done in the factory. Do not re-calibrate the scale unless it is
not accurate.
How to calibrate
Before entering calibration mode, press the switch key at the bottom of the
scale to be ON, and then press (ON/OFF) to turn the power on for 1 minute for
warming up the scales.
While the scale is in off condition, press and hold (ZERO) key then
press (ON/OFF) key to turn on the scale. The display will show CAPu=,
Press twice (PCS) key, it will show CALU= (Calibration unit selection),
Press (UNIT) key to select unit between kg or lb, the display will show a
small unit arrow on the right to indicate kg or lb, press (PCS) key to
confirm your selection.
Press (PCS) key again to enter next menu, the display will show CAL.
Press (UNIT) key, the display will show flashed digit. Press (ZERO) key
to increase the flashed digit, press (UNIT) key to move flashed digit,
press (PCS) key to confirm your selection.
Press (ZERO) key, it will show CAL and then the AD value, press
(UNIT) key, it will show a flashing calibration weight, put the shown
weight on the platform and wait the stability indicator shows, then press
(UNIT) key to confirm, the display will show ------ and then the AD
value, now the calibration is done. Press (ON/OFF) to turn off the scale,
press (ON/OFF) again to turn on the scale to test if the weighing is
accurate, if not, repeat above step.
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If calibration is repeatedly incorrect then: 1) Replace the batteries, 2) Try a more
stable surface and interference free location.
Function Settings
Enter function setting menu. Press (ON/OFF) to turn the power off. Press and
hold (PCS), then press (ON/OFF) to turn on the scale, the display will show
A_ON or A_OFF, it enters the function setting menu now.
Selection of auto backlight mode. After the scale enters function setting menu,
press (PCS) key, the display will show L_ON or L_OFF, press (ZERO) for
selection of L_ON or L_OFF, L_ON means backlight function active L_OFF
means auto backlight function inactive.
Selection of auto shut off mode. After the balance enter function setting menu.
Press (PCS) key, the display will show A_ON or A_OFF, press (ZERO) for
selection of A_ON or A_OFF. A_ON means auto shut off function active,
A_OFF means auto shut off function inactive.
Return to weighing mode. Press (ON/OFF) to turn the power off, press (ON/OFF)
again to turn on the power and the scale returns to weighing mode.
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Maintenance & Service
The weighing scale is a precision instrument, it must be treated carefully and cleaned
regularly
For maintenance-work, the balance must be disconnected from the power supply
(remove power adapter plug from socket). Also ensure that the balance cannot be
connected to the power supply during the work by a third party.
Make sure that no liquid spills into the scale while performing maintenance work. If
liquid is spilled on the scale, it must be inspected by a service technician.
Regularly perform maintenance to the weighing pan and the weighing pan holder by
removing any dirt or dust from under the weighing pan and on the weighing scale
housing. Use a soft brush or a soft, lint-free cloth, moistened with a mild soap solution
Never use solvents, acids, alkalis, paint thinners, scouring powders or other aggressive
or corrosive chemicals for cleaning; these substances can cause damage to the
surfaces of the scale housing.
Transport & Storage
Your weighing machine is a precision instrument, treat it carefully. Avoid shaking,
severe impacts and vibration during the transportation. Make sure that there are no
marked temperature fluctuations during the transportation and that the weighing
machine does not become damp (condensation).
If you would like to take the weighing machine out of service for an extended period,
disconnect it from the electricity supply, clean it thoroughly (refer to Maintenance &
Service) and store it in a place which meets the following conditions:
No violent shaking, no vibrations
Minimum temperature fluctuations
No direct solar radiation
Minimum moisture

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Warranty
The products are under warranty against factory defects for a period of two (2) years
from the date of shipment.
For Customers within the lower 48 states of the continental United States. LW
Measurements will pay for fright both ways for the first 30 days after purchase. After 30
days expire the customer is responsible for shipping the product back to us. After the
product is received we will inspect it and as necessary we will repair or replace and will
ship the product back to the customer at our expense.
Any new scales returned for warranty must be properly packaged in the original box. If
they are not properly packed an in the original box, the customer pays for shipping cost.
If we determine there is a factory defect, we will pay for the shipping back. If we
determine that it is not a factory defect, the customer will pay shipping.
For Customers outside the lower 48 States, including Mexico, Canada, Puerto Rico,
Hawaii, Alaska and all other countries, customers must pay for shipping.
Our warranty does not cover misuse or neglect including but not limited to battery or
water damage, overloading, and chewed or cut wires. If the product is found to have
been misused or damaged by the customer, LW measurements is not responsible for
the cost of return.
For warranty claims please go online to lwmeasurements.com and fill out the warranty
submission form or call your customer service representative.
Rev.4 02.07.2023